Aeroplane control



.lanu 5, 1932. H. UMESAK; 1,839,716

AEROPLANE CONTROL Filed March 27, 1951 2 Sheets-Sheet 1 Inventor QC/5:23am a'n/es'z' B Q /3 y om Jan. 5, 1,932. H, UMEsAKl 1,839,716

AEROPLANE CONTROL Filed March 27, 1931 2 Sheets-Sheet 2 2?@ ffy-ff Inventor A @waa/22% 45 ings, it will be seen that 5 designates a some- Patented Jan. 5, 1932 HACHITARC UliIEsAKI, 0F CHICAGO, LLrNors Annornnnn CONTROL Application ledilarch 27, 1931. Serial No. 525,778.

rlhis invention relates broadly to certain neu7 and useful improvements in aeroplane controls, and the primary obj ect or' this invention is to improve over that type of aeroplane control embodying the subject matter of my copending application Serial No. 509,998 filed under date of January 20, 1931.

A very important object of the present invention is to provide means for controlling the ailerons whereby the same may be used as a' braking` means for the aeroplane when the same is landing, thus permitting the landing of the aeroplane within a restricted area, the'aileron being so controlled as to decrease skidding and being also controllable to increase the lifting power of the aeroplane whereby the saine may also take off with but a minimum of taxiing.

Other objects and advantages of the invention will become apparent from a study of the *following description, taken in connection with the accompanying drawings wherein Figure 1 is a side elevational viewot an aeroplane equipped with my improved control.

Figure 2 is a sectional elevational view of the control device per se.

.ll-ligure 3 is a vertical sectional elevational view taken substantially on the line 3-3 of Figure 4.

Figure 4 is a side elevational view structure as shown in Figure 2.

Figure 5 is a top plan view of a wheel, the same having its several positions indicated in dotted lines.

Figure 6 is a detail sectional view taken substantially on the line 6-6 of Figure 4.

Figure 7 is a fragmentary detail sectional elevational view of the lower end portion of the control stick. c p

Figure 8 is a diagrammatic view showing the manner of controlling the aileron.

l/Vith reference more in detail to the drawof the what conventional type of aeroplane and mounted within the fuselage of 'the aeroplane in convenient reach of the pilot, is my improved control which include a control stick 6 constrained to swing back and forth on a horizontal axis between a pair of parallel guide members 7. At its lowermost end, the stick 6 terminates in a pin 8 rotatable in a socket 9 and secured in said socket against casual'disengagement from said socket by suitable means 10. Socket 9 at its lower end is provided with an apertured shank 11 mounted on a pivot pin 12 extending between a pair of vertical posts rising from an anchoring base 13.

Stick G above the upper edges of the guides 7 is thickened and has said thickened portion slotted to provide spaced parallel vertical extensions 14 between which is journalled a wheel 15 the axle of which isjournalled in bearings 1G vertically slidable in slots provided in the extensions 14 vand normally urged upwardly with respect to said extensions through the medium of suitable spring devices as shown in Figure 2. Windable upon the wheel 15 are cables 17 which extend downwardly and pass 'through suitable guides 18 and then extend rearwardly to be connected to the rudder 5a of the aeroplane.

Suitably clamped about the lower portion of the stick 6 is a two part collar 19 to which is pivotally connected as at- 20 a fork 21 provided onone end of a control rod 22 which through the medium of suitable cables is operatively connected with the elevators 5b of the aeroplane. Each of the extensions 14 has mounted thereon a substantially triangular frame 23 connected by rods 24 engageable with the cables 17 for guiding the cables, and retaining the same in operative position with respect to the wheel 15.

To control the rudder 5a, wheel 15 is rotated to the right or left according to which direction it is intended to swing the rudder 5a. By rocking the stick 6 about the pivot 12 toward or away from the pilot, a raising or lowering of the elevators 5?) is effected.

The structure and operation above detailed, with the exception of the frames 23,V cross bars 24,n and the particular'inanner of pivotally and rotatably supporting the stick 6, is substantially identical with that described in my above referred to co-pending application, and accordingly a more detailed description is thought unnecessary.

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one end with the upper portion ot the ailerons 5c as at 28 and at their opposite ends areseif of the arms 26.

und

pulleys 29. Additional cables 30 are secured at one end 'tothe under sides of the ailerons 5c as at 3l and adjacent theiropposite ends cross one another and are secured to the lower ends of depending extensions or terminals 25. Cables 80 are trained over suit- 'ably arranged guide pulleys 32.

r'hus it will be apparent, by rocking tie stick 6 tov rrd the right in Figure 8, a pull will be exerted on the cables 2? thus swinging the aileron 5c upwardly with respect to the wing or srstaiuine' plane et the aeroplane; and by rocking the stier; G in thc opposite direction or toward the lett in Figure 8 a pull will be exerted on the cable 30 for swinging the ailerons 5c downwardly with respect to the sustaining plane or wing et the aeroplane. Ey thus positioning the ailerons 5c t the desired angle with respect `to Y ng piane or wing of the aeroplane, the aileron will provide wind resisting surfaces tor retarding or braking the speed ot the aeroplane when the l? ter in the act oi landing. Further, byV suitably positioning the ailerons with respect to the sustaining plane or wing of the aeroplane, the lifting power ot the sustaining plane or wing will be increased thus permitting tie aeroplane to take oli without travelling an excessive distance over ground prio to rising into the air. By ro ing the stick 6relative to socket 9, one of the ailerons maybe raised and the other lowered as desired.

Even though l have hereinshown and described the preferred embodiment oi"- the invention, it is to be understood that the same is susceptible ot changes, modifications and improvements coming within the scope of the appended claims.

Having thus described my invention, whatv l claim asnewis: e Y

l. A control device for swinging the ailerons of the sustaining` plane or an aeroplane relative to said sustaining plane, said Vdevice comprising a rockably mounted stick, a member mounted on said stick and having oppositely extending arms projecting therefrom, each of sain arms at its Jr'ree end terminating Leraar/1e in a downwardly extending terminal, cables connected to the top side of the aileron and with the outer end of said oppositely extending arms, additional cables connecting with the under side of said ailerons and remote from said ailerons crossing one another and connected to the lower ends of said terminals, and guide pulleys for all of said cables.

2. A control device tor aeroplanes comprising in combination a pivotally mounted control stick, means for transmitting movement of said stick to the ailerons and elevators of the aeroplane, a wheel rotatably supported on said stick, means for transmitting movement of said wheel tothe rudder of the aeroplane, and means tor mounting said Wheel on said stick whereby to permit a shifting ot the wheel relative tosaid stick to prevent the swinging ot the rudder during r cking movement ot said stick. K

A control device for aeroplanes comprising in combination a rockably mounted control stick, means operatively connecting said stick with the ailerons and elevators of the aeroplane for transmitting movement of said stick to said ailerons and elevators, a control wheel, means for rotatably mounting the wheel on said stick, said means including bearings shittable relative to said stick, cables trained over said wheel and operatively connected with the rudder of the aeroplane, and means engageable with said cables for retaining the same against displacement relative to said wheel.

4. ln a control device and in combination with the ailerons of an aeroplane, a control stick, means for rockably and rotatably mounting the stick, oppositely extending members projecting Jfrom the stick and terminating in depending projections, having.,T their transverse centers normally in alinement with the pivot of the stick, flexible elements connecting one side of the ailerons with the said members, and additional flexible elcments connecting` the opposite side of the ailerons with the lower ends of said projections.

ln testimony whereof I aiiix my signature.

- HACHITARO UMESAKI. 

